我有一个带有静态属性的类，我想为特定对象访问它。代码如下:importUIKitprotocolTheme{staticvarname:String{get}funcgetBackgroundColor()->UIColor}classDefaultTheme:Theme{staticvarname="Defaulttheme"funcgetBackgroundColor()->UIColor{returnUIColor.blackColor()}}varcurrentTheme:Theme=DefaultTheme()println(currentTheme.name)//Error